Disclaimer

General Disclaimer

The information provided by LeverLab (“https://www.worldlever.com”) is for general informational and educational purposes only. All information on the site is provided in good faith; however, we make no representation or warranty of any kind, express or implied, regarding the accuracy, adequacy, validity, reliability, availability, or completeness of any information on the site.

The use of any information or tools from this website is entirely at your own risk, for which we shall not be liable. It shall be your responsibility to ensure that any information or tools available through this website meet your specific requirements and circumstances.

Verify With a Qualified Engineer When Needed

Calculator results and technical information on LeverLab model idealized mechanics — frictionless or simplified-friction formulas for levers, pulleys, gears, inclined planes, wheels and axles, and screws — and may not capture every real-world factor. Real-world outcomes vary by material, manufacturing tolerance, wear, lubrication, and load, and results should be treated as a starting point, not a certified figure. Before you rely on a result for a load-bearing, safety-critical, or commercial build, you should use your own judgment and verify the figures with a qualified engineer or the equipment’s manufacturer; always do your own due diligence.

Not Professional Engineering Advice

Content and tools on LeverLab, including the Lever Calculator, Pulley Calculator, Gear Ratio Calculator, Inclined Plane Calculator, Wheel & Axle Calculator, and Screw Calculator, are for educational and informational purposes only and are not a substitute for advice from a qualified engineer. They do not constitute professional engineering advice of any kind. The figures and suggestions our tools provide are general, idealized estimates, not guarantees of results. Always verify load-bearing or safety-critical figures with a qualified engineer before committing money, materials, or time to a build.

Tool Accuracy and Limitations

Calculation Accuracy

Our simple-machine calculators and tools provide estimates based on standard, idealized mechanics formulas, the figures you enter, and widely-taught conventions. Results should be used as starting points and learning aids, not absolute values or guaranteed outcomes.

Factors Affecting Accuracy

Actual results may vary significantly due to:

• Friction & Wear: Real bearings, ropes, gear teeth, and threads all have friction and wear that an idealized formula only approximates, even with an efficiency figure applied.
• Materials & Manufacturing: Material strength, tolerances, and manufacturing quality affect how a real mechanism performs compared to the theoretical calculation.
• Setup Choices: The specific lengths, radii, tooth counts, and configuration you choose, and how well they suit your actual task.
• Measurement Factors: Self-reported figures, rounding, estimation, and differences between estimated and actual numbers.

Our Recommendations

For best results with your projects:

• Use tool results as starting points and learning aids, not absolute values.
• Always consider your specific materials, loads, and goals.
• Check load-bearing or safety-critical decisions with a qualified engineer before you act.
• Consult trusted engineering references for specific questions.
• Compare multiple sources to improve future decisions.

Not Professional Advice

LeverLab tools and content do not constitute:

• Engineering Advice: Information about mechanical advantage, torque, and gear ratios is general only and is not a substitute for advice from a qualified engineer. Confirm critical concerns with a professional.
• Safety Guidance: Our tools and content are educational only and never replace sound judgment, applicable safety codes, and advice from a qualified engineer.
• Guaranteed Outcomes: Calculator outputs are learning aids only and are not a guarantee of load, torque, or real-world performance.
• Certified Expertise: Our content supplements but does not replace certified engineering guidance.

Consider consulting a qualified engineer for:

• Load-bearing or structural calculations for a real build
• Safety codes, standards, or regulatory requirements
• Material selection and failure-mode analysis
• Commercial or industrial equipment design
• Any mechanism where failure could cause injury or damage
• Major purchasing or project decisions specific to your situation

Safety Disclaimer

Our tools provide general, educational guidance only. Building or modifying real machines can have safety consequences and benefits from professional advice. Always:

• Consult a Qualified Engineer: Check with a professional for any load-bearing, safety-critical, or persistent design problem.
• Respect Manufacturer Specifications: Treat load ratings, material limits, and manufacturer guidance with caution; do not assume.
• Use Good Judgment: Test builds gradually and notice how a mechanism actually performs under load.
• Compare Widely: Weigh guidance against multiple trusted engineering sources.
• Confirm With a Professional: Validate concerns with a qualified engineer before you commit to a build.

If you have any concerns about a project:

• Have significant concerns reviewed by a qualified engineer.
• Follow applicable safety codes and manufacturer guidance carefully.
• Avoid committing to a load-bearing build without due diligence.
• Follow safe workshop and tool-handling practices.
• Treat unfamiliar mechanisms and materials with extra care and caution.

No Warranty

LeverLab expressly disclaims all warranties, whether express, implied, statutory, or otherwise, including but not limited to implied warranties of merchantability, fitness for a particular purpose, and non-infringement. We do not warrant that our tools, calculations, or information are error-free, accurate, or complete, or that our website will be available without interruption at all times.

Limitation of Liability

To the maximum extent permitted by applicable law, in no event shall LeverLab be liable for any direct, indirect, punitive, incidental, special, consequential, or exemplary damages, including without limitation damages for material loss, project disruption, lost savings, goodwill, use, or data arising out of or related to your use of our tools and services.

User Responsibility

By using LeverLab tools and services, you acknowledge and agree that:

• You will use your own judgment, and consult a qualified professional, when applying our recommendations to your specific situation.
• You will verify calculation results and seek additional sources of information before making important decisions.
• You are responsible for seeking professional advice for any load-bearing, safety, or persistent problem that may apply to you.
• You assume all risks associated with building, testing, and using mechanisms, and the use of our tools and information.

External Links Disclaimer

The site may contain links to other websites or content originating from third parties. Such external links are not investigated, monitored, or checked for accuracy, adequacy, validity, reliability, availability, or completeness by us. We do not warrant, endorse, guarantee, or assume responsibility for the accuracy or reliability of any information offered by third-party websites linked through the site.

Advertising Disclaimer

LeverLab displays advertisements from third-party advertising networks, including Google AdSense. These advertisements are clearly distinguishable from our editorial content. The presence of advertisements on our website does not constitute an endorsement of the advertised products or services.

Changes to This Disclaimer

We reserve the right to modify this disclaimer at any time. Changes will be posted on this page with an updated revision date. Your continued use of our website and tools after any changes indicates your acceptance of the modified disclaimer.

Contact Us

If you have any questions or concerns about this Disclaimer, please visit our Contact page or email us at support@worldlever.com.